MAX6385XS39D4-T

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The MAX6385XS39D4-T is an integrated and extremely reliable, single-channel supervisor, specifically designed to monitor the power and ground pins of microprocessor-based systems. It is an efficient supervisor with a wide operating range, good programmability, and sophisticated power-on reset sequencing that supports CPU reset, VDD, and I/O power supply reset. This supervisor is ideal for monitoring and resetting complex systems with multiple power supplies and remote I/O devices, such as those in security, radio communications, consumer electronics and automotive systems.

The MAX6385XS39D4-T monitors system voltages, circuit supply current, reset time, and receives external reset signals. It also offers temperature monitoring for temperature-induced reset, and detect over-voltage, under-voltage, outside temperature and input/output supply failures. The supervisor provides a selectable power-on reset delay to allow the system to stabilize before asserting reset signals. Additionally, this supervisor offers a minimum reset signal assert time of 200ms, enabling it to cope with slow system power-up characteristics, and also provide reliable exposure to hot/cold temperature cycles.

The MAX6385XS39D4-T consists of four parts, the power connector, reset signal output, selectable debounce logic, and temperature monitoring. The power connector enables the system to supply power up to 3.3V, and can be used to set the reset thresholds. The reset signal output is an open-drain active-low signal, which can be connected to an external reset device. The selectable debounce logic allows customization of the power-on reset delay, and helps to minimize the chances of false reset signals. Finally, the temperature monitoring allows the system to detect temperature changes, and provide a reset if required.

To ensure maximum reliability and safety, the MAX6385XS39D4-T contains two integrated N-MOSFETs that are activated by an open-drain output and an active-low signal. Furthermore, it features built-in pull-up resistors and discharge capacitors, further reducing component count and making the overall design simpler. The MAX6385XS39D4-T also contains an enable power-on reset input, which can be used to disable the reset circuit during reset initialization.

The MAX6385XS39D4-T contains additional features such as over-voltage and under-voltage detection, detect a supply voltage rise time in excess of 1.3 ms, a wide operating temperature range (–40°C to +125°C), and a 3.3V input voltage range (1.8V to 5.5V). It also provides an adjustable reset time-out period, selectable reset debounce time, and built-in pull-up and discharge capacitors for smoother reset operation. All of these features make the MAX6385XS39D4-T a reliable and safe supervisor for monitoring and resetting complex systems.

In conclusion, the MAX6385XS39D4-T is a single-channel supervisor that is specifically designed to monitor the power and ground pins of microprocessor-based systems. It offers wide operating range, adjustable reset time-out period and selectable debounce logic to ensure reliability and safety. Additionally, it contains two integrated N-MOSFETs, has a wide operating temperature range and provides an adjustable reset time-out period. These features make the MAX6385XS39D4-T an ideal power monitor and reset controller for complex systems with multiple power supplies and remote I/O devices.

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